Patent US3020153A successfully refreshed from Google Patents.
US3020153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iron and steel production
Assignee: Individual
•
Filing: 1958-11-06
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Granted: 1962-02-06
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Expires: 1978-11-06
Abstract
No abstract record available.
Inventors
- 👤 Linz Arthur
- 👤 Norman F Tisdale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:28
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/04; C21C7/076; C21C7/06; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A METHOD FOR THE PRODUCTION OF RIMMING STEELS WHICH COMPRISES PREPARING AN IRON CONTAINING MELT, ADDING A METALLIC CONTAINING MATERIAL DURING FURNACING, INCORPORATING FROM 0.5 TO 5.0 POUNDS PER TON OF IRON OF A COMPLEX RARE EARTH METAL SALT THEREWITH SAID SALT HAVING THE GENERAL FORMULA MRX4 IN WHICH M REPRESENTS A MEMBER OF THE GROUP CONSISTING OF SODIUM AND POTASSIUM, R REPRESENTS A RARE EARTH METAL HAVING AN ATOMIC NUMBER RANGING FROM 57-71, AND X IS FLUORINE.
Claim 2
Independent Claim
78 words
A METHOD FOR THE PRODUCTION OF RIMMING STEELS WHICH COMPRISES PREPARING AN IRON CONTAINING MELT, ADDING A METALLIC CONTAINING MATERIAL DURING FURNACING, INCORPORATING FROM 0.5 TO 5.0 POUNDS PER TON OF IRON OF A COMPLEX RARE EARTH METAL SALT THEREWITH SAID SALT HAVING THE GENERAL FORMULA MRX4 IN WHICH M REPRESENTS A MEMBER OF THE GROUP CONSISTING OF SODIUM AND POTASSIUM, R REPRESENTS A RARE EARTH METAL HAVING AN ATOMIC NUMBER RANGING FROM 57-71, AND X IS FLUORINE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |